Sep 8, 2023 · No you wouldn't alter the "content" of the list, if you could mutate strings that way. But in Python they are not mutable. Any string operation returns a new string. If you had a list of objects you knew were mutable, you could do this as long as you don't change the actual contents of the list. Thus you will need to do a map of some sort.

float(item) do the right thing: it converts its argument to float and and return it, but it doesn't change argument in-place. A simple fix for your code is: new_list = [] for item in list: new_list.append(float(item)) The same code can written shorter using list comprehension: new_list = [float(i) for i in list] To change list in-place:

If set to True, then the list elements are sorted as if each comparison were reversed. In general, the key and reverse conversion processes are much faster than specifying an equivalent cmp function. This is because cmp is called multiple times for each list element while key and reverse touch each element only once.

Apr 11, 2011 · Agree with @Bogdan. This answer creates a string in which the list elements are joined together with no whitespace or comma in between. You can use ', '.join(list1) to join the elements of the list with comma and whitespace or ' '.join(to) to join with only white space –

Sep 21, 2015 · In python(2.x), comparison of a list with an int will compare the types, not the values. So, your comparison results in True which is equivalent to 1 . In other words, your expression is equivalent to:

Dec 6, 2012 · item itself is a copy too, but it is a copy of a reference to the original nested list, so when you refer to its elements the original list is updated. This isn't as convenient since you don't have the names; perhaps a dictionary or class would be a more convenient structure.

a=input()#taking input as string. Like this-10 5 7 1(in one line) a=a.split()#now splitting at the white space and it becomes ['10','5','7','1'] #split returns a list for i in range(len(a)): a[i]=int(a[i]) #now converting each item of the list from string type print(a) # to int type and finally print list a

Python: change elements position in a list of instances. 3. Reorder Python List. 4. Swap two values ...

There are several methods to convert string numbers in a list to integers. In Python 2.x you can use the map function: >>> results = ['1', '2', '3'] >>> results = map(int, results) >>> results [1, 2, 3] Here, It returns the list of elements after applying the …

Oct 31, 2013 · Use the insert method of a list: l = list(...) l.insert(index, item) Alternatively, you can use a slice notation: l[index:index] = [item] If you want to move an item that's already in the list to the specified position, you would have to delete it and insert it at the new position: l.insert(newindex, l.pop(oldindex))